Rope haulage apparatus for mines



Sept. 26, 1950 J. B. MAvoR 2,523,871

f' ROPE HAULAGE APPARATUS FOR MINES Filed April 8, 1948 j//l/ /l l /ll/ /l Patented Sept. 26, 1956 UN TED S TAT E S FFI CE Y n assenti... p ROPE HAULHGE ABPARATSEORMNES 1 John vBridie Mavor, Glasgow, Scotland,;assigorf" to Mavor & Coulson, Limited,

land

Glasgow, Scots.

Application April 8, 1948, SerialNo.y 19,796 ln Great Britain October 10, 1946 4 Claims.

1 This invention relates to rope haulage apparatus for mines, say coal mines,\ and its object isV to provide an improved anchorage for a haulage rope or other cable.

According to the invention a haulage anchorage comprises a hydraulic unit including a jack component which presses against the mine floor and roof and a haulage component which is subjected to hydraulic pressure by the pull of a haulage cable and transmits the pressure to the jack component so as to augment the anchoring force exercised thereby. That is to say, the augmented anchoring force exercised by the jack is proportionate to the pull applied to the haulage cable.

Preferably, hydraulic cylinders incorporated in the components of the anchorage are so designed that the force exercised by the jack is several times as great as the haulage pull applied Vto the cable.

Examples illustrative of the invention areA shown by the accompanying diagrammatic drawing, in which:

Fig. 1 is a sectional elevation of a haulage rope anchorage having a two-cylinder jack component, the section being on the line I-I of Fig. 2, which is a sectional elevation on the line 2-2 of Fig. l.

Fig. 3 is a sectional elevation of a haulage rope anchorage having a one-cylinder jack component, the section being on the line 3-3 of Fig. 4, which is a sectional elevation on the line 4-4 of Fig. 3.

Referring to Figs. 1 and 2, in this example, the jack component of the improved anchoragel consists of two juxtaposed hydraulic cylinders 5 and E having a common base l which bears upon the iloor A of a mine and rams 'l and 8 whose heads 9 are formed to bear upon its roofwork B. The cylinders 5 and 6 are interconnected by a strong cross-connection Ill including a horizontal hydraulic cylinder I'l. The cylinder II is closed at one end I2 and the rod 3 of its ram extends through a gland I4 at the other end. The gland end of this cylinder Il opens through ports I5 into both jack cylinders 5 and 6. A haulage rope I6 is attached to the rod I3. The pistons of the three rams l, 8 and I3 are indicated by I'I, I8 and I9 respectively.

The anchorage includes a motor-driven hydraulic pump 20 for supplying hydraulic liquid through a conduit 2l with a stop valve 22 to the cylinders 5, 6 and Il. The arrangement is` such that, when the valve I9 is opened Vand the pump I1 is operated, the hydraulic liquid pumped into the cylinders 5, B and I'Iv performs these actions, namely: the pistons I'I and I8 are forced up so as tol extend the jacks, which therefore anchor themselves between the floor A and roof B; the piston I 9 is forced to the closed end i2 of its cylinder Il. Thereafter the pump 2! is stopped and the valve 22 is closed, so that the hydraulic liquid is locked inside the unit composed of the intercommunicating cylinders 5, 6 and H. Thus when the rope I6 is pulled, the hydraulic liquid in the horizontal cylinder I'I is subjected to augmented pressure and the hydraulic fluid in the remainder of the unit, namely the jack cylinders 5 and 6, is subjected to the same pressure, so that the anchoring hold applied between the oor A and roof B by the jacks is also augmented.

The effective areas of the pistons ITI, I8 and I d of the rams 1, 8 and I3, respectively, are so proportioned that the jacks apply equal anchoring forces which total an amount several times as great as the force applied to the horizontal ram I3 by the pull of the rope I6.

In the simpler construction according to Figs. 3 and 4, only a single cylinder 5 and ram I are provided as the jack component. The cylinder Il of the haulage-rope ram I3, I9 opens through a port I5 into the single cylinder 5; and it is into the bottom ofthis cylinder 5 that the supply conduit 2i from the pump 20 opens. In other respects, the construction is similar to that already described With reference to Figs. l and 2, the same numerals being used to denote corresponding parts. It will be noted that the jack piston I7 is substantially larger in eiective area than the haulage piston I9, so that the anchorage for-ce will Vbe proportionately greater than the haulage force.

I claim:

l. A mine haulage anchorage comprising a hydraulic cylinder-and-r-am anchoring component for use as a jack to press against the mine licor and roof, a hydraulic haulage component parts of Which consist of a cylinder and a ram, one of the parts being movable relative to the other thereof under the pull cfa haulage cable, and a connection for hydraulic liquid between the cylinders of said components, so that a pulll applied tosaid one of the parts augments the hydraulic pressure in the haulage component and the augmented pressure is transmitted to the anchoring component.

.2'. A mine haulage anchorage as claimed by claim 1 in which the respective components intercommunicate so that each of them is subjected to the same hydraulic pressure and in Which the respective components are so proportioned that the anchoring force is greater than the force of the haulage pull. v

3. A mine haulage anchorage comprising a jack component which when extended engages the mine oor and roof, said jack including a hydraulic cylinder, in combination with a haulage component consisting of a hydraulic cylinder and a ram movable therein, the ram being attachable to a haulage cable to receive the pull thereof, and a connection to pass hydraulic liquid from the haulage-component cylinder to the jack-component cylinder in order to increase the jacking pressure with increase in the pull of said cable.

4. A mine haulage anchorage as claimed by claim 3 in which the jack component includes a REFERENCES CITED The following references are of record in the le of this patent:

FOREIGN PATENTS Country Date Great Britain Feb. 23, 1949 Number 

